The term 'smoothly transition' can be summarized by the crossword solution 'SEGUE, ' which is a five-letter word. SEGUE is an Italian word meaning 'to follow, ' and it is used to describe a smooth transition from one topic to another, or from one scene to another in a movie or play. In music, SEGUE is used to describe a transition from one song to another without any pause. In short, SEGUE is a term used to describe a smooth transition from one thing to another.